I wonder where do you work, that everyone smokes right at the workplace? Actually, I think that there is every reason to file a complaint with the labor inspectorate, since the employer does not create proper working conditions for its employees. At present, smoking is generally prohibited on the premises of organizations, with the exception of special designated smoking areas, equipped in accordance with special technical requirements. Here is the composition of your colleagues under Art. 6.24 Administrative Code of the Russian Federation
Change jobs is the first thing that comes to mind.
If not an option, then ask the boss to transfer you as far away from them as possible.
You can sit in a gas mask
well, or go freelance